Air conditioner system and control method thereof

ABSTRACT

An air conditioner system includes an air conditioner and a cloud platform. The air conditioner includes an indoor unit and an outdoor unit. The cloud platform is configured to: in a case where the air conditioner is in a heating mode, determine that the outdoor unit performs one of defrosting and ending defrosting; if determining that operating parameters of the outdoor unit satisfy a first preset condition, send a first sub-instruction to the outdoor unit, so that the outdoor unit starts defrosting according to the first sub-instruction; if determining that the operating parameters satisfy any one of a plurality of second preset conditions, send a second sub-instruction to the outdoor unit, so that the outdoor unit ends defrosting according to the second sub-instruction.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation-in-part application of International Patent Application No. PCT/CN2022/081837, filed on Mar. 18, 2022, pending, which claims priority to Chinese Patent Application No. 202110604024.8, filed on May 31, 2021; this application is a continuation-in-part application of International Patent Application No. PCT/CN2022/081839, filed on Mar. 18, 2022, which claims priority to Chinese Patent Application No. 202110604037.5, filed on May 31, 2021, which are incorporated herein by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates to the field of air conditioning technologies, and in particular, to an air conditioner system and a control method of an air conditioner system.

BACKGROUND

Generally, an air conditioner performs one of a cooling cycle and a heating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator, and the air conditioner has become a common product in work and life of people.

SUMMARY

In an aspect, an air conditioner system is provided. The air conditioner system includes at least one air conditioner and a cloud platform. The at least one air conditioner includes an indoor unit and an outdoor unit. The cloud platform is communicatively connected to the outdoor unit, and the cloud platform is configured to: in a case where the air conditioner is in a heating mode, determine the outdoor unit to perform one of defrosting and ending defrosting according to the operating parameters of the outdoor unit; if determining that the operating parameters satisfy a first preset condition, send a first sub-instruction to the outdoor unit, so that the outdoor unit starts defrosting according to the first sub-instruction; if determining that the operating parameters satisfy any one of a plurality of second preset conditions, send a second sub-instruction to the outdoor unit, so that the outdoor unit ends defrosting according to the second sub-instruction. The plurality of second preset conditions include a first determining condition, a second determining condition, and a third determining condition. The first determining condition includes using at least one of a minimum value of a heat exchange pipe temperature, a relative humidity of an outdoor environment, time when the outdoor unit has performed defrosting, a maximum value of an exhaust pressure of the outdoor unit, or a maximum value of an exhaust temperature of the outdoor unit as a determining parameter. The second determining condition includes using at least one of the time when the outdoor unit has performed defrosting or the maximum value of the exhaust pressure of the outdoor unit as a determining parameter. The third determining condition includes using the time when the outdoor unit has performed defrosting as a determining parameter.

In another aspect, a control method of an air conditioner system is provided. The air conditioner system includes at least one air conditioner and a cloud platform. The at least one air conditioner includes an indoor unit and an outdoor unit, and the cloud platform is communicatively connected to the outdoor unit. The control method of the air conditioner system includes: collecting and sending operating parameters of the outdoor unit; if determining that the operating parameters satisfy a first preset condition, sending a first sub-instruction to the outdoor unit, so that the outdoor unit starts defrosting according to the first sub-instruction; if determining that the operating parameters satisfy any one of a plurality of second preset conditions, sending a second sub-instruction to the outdoor unit, so that the outdoor unit ends defrosting according to the second sub-instruction. The plurality of second preset conditions include a first determining condition, a second determining condition, and a third determining condition. The first determining condition includes using at least one of a minimum value of a heat exchange pipe temperature, a relative humidity of an outdoor environment, time when the outdoor unit has performed defrosting, a maximum value of an exhaust pressure of the outdoor unit, or a maximum value of an exhaust temperature of the outdoor unit as a determining parameter. The second determining condition includes using at least one of the time when the outdoor unit has performed defrosting or the maximum value of the exhaust pressure of the outdoor unit as a determining parameter. The third determining condition includes using the time when the outdoor unit has performed defrosting as a determining parameter.

In yet another aspect, a control method of an air conditioner system is provided. The air conditioner system includes an air conditioner, a cloud management platform, and a cloud platform. The air conditioner includes an indoor unit and an outdoor unit, and the outdoor unit includes a compressor. The cloud management platform is communicatively connected to the outdoor unit. The cloud platform is communicatively connected to the cloud management platform. The method includes: collecting and sending operating parameters of the outdoor unit; the cloud management platform receiving the operating parameters of the outdoor unit and sending the operating parameters to the cloud platform; the cloud platform performing a target calculation according to the operating parameters, and sending a third instruction to the cloud management platform, the third instruction including a heating control constant and a cooling control constant calculated by the cloud platform according to the operating parameters; the cloud management platform sending the third instruction to a corresponding outdoor unit; the outdoor unit adjusting a maximum value of a target frequency of the compressor according to the third instruction, so that a maximum value of an actual frequency of the compressor is substantially equal to the maximum value of the target frequency. That the cloud platform performing the target calculation according to the operating parameters, and sending the third instruction to the cloud management platform, includes: obtaining a maximum value of a saturation pressure according to a maximum value of a condensing temperature in a case where the outdoor unit is heating, and correcting the maximum value of the saturation pressure by using a control target value, so as to obtain the heating control constant; if a set parameter is equal to a first preset value, determining a minimum value of a target evaporation temperature of the outdoor unit as the cooling control constant; if the set parameter is equal to a second preset value, determining the cooling control constant according to a corresponding relationship between the set parameter and the cooling control constant.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an air conditioner system, in accordance with some embodiments:

FIG. 2 is a block diagram of an outdoor unit, in accordance with some embodiments;

FIG. 3 is a schematic diagram of another air conditioner system, in accordance with some embodiments;

FIG. 4 is a diagram showing state changes of outdoor units during alternate defrosting of the outdoor units, in accordance with some embodiments;

FIG. 5 is a flow chart of a control method of an air conditioner system, in accordance with some embodiments;

FIG. 6 is a flow chart of another control method of an air conditioner system, in accordance with some embodiments;

FIG. 7 is a schematic diagram of yet another air conditioner system, in accordance with some embodiments;

FIG. 8 is a block diagram of an Internet of Things (IoT) management platform, in accordance with some embodiments;

FIG. 9 is a schematic diagram showing a topology and a data stream of an air conditioner system, in accordance with some embodiments;

FIG. 10 is a schematic diagram showing an architecture and a data stream of a cloud management platform, in accordance with some embodiments;

FIG. 11 is a flow chart of yet another control method of an air conditioner system, in accordance with some embodiments;

FIG. 12 is a flowchart of yet another control method of an air conditioner system, in accordance with some embodiments; and

FIG. 13 is a flowchart of yet another control method of an air conditioner system, in accordance with some embodiments.

DETAILED DESCRIPTION

Some embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. However, the described embodiments are merely some but not all embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on embodiments of the present disclosure shall be included in the protection scope of the present disclosure.

Unless the context requires otherwise, throughout the specification and the claims, the term “comprise” and other forms thereof such as the third-person singular form “comprises” and the present participle form “comprising” are construed as an open and inclusive meaning, i.e., “including, but not limited to.” In the description of the specification, the terms such as “one embodiment,” “some embodiments,” “exemplary embodiments,” “example,” “specific example,” or “some examples” are intended to indicate that specific features, structures, materials, or characteristics related to the embodiment(s) or example(s) are included in at least one embodiment or example of the present disclosure. Schematic representations of the above terms do not necessarily refer to the same embodiment(s) or example(s). In addition, the specific features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any suitable manner.

Hereinafter, the terms such as “first” and “second” are used for descriptive purposes only and are not to be construed as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Thus, features defined by “first” or “second” may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the term “a plurality of” or “the plurality of” means two or more unless otherwise specified.

In the description of some embodiments, the term “connected,” and the derivative thereof may be used. The term “connected” should be understood in a broad sense. For example, the term “connected” may represent a fixed connection, a detachable connection, or a one-piece connection, or may represent a direct connection, or may represent an indirect connection through an intermediate medium. The embodiments disclosed herein are not necessarily limited to the content herein.

The phrase “A and/or B” includes the following three combinations: only A, only B, and a combination of A and B.

The use of the phase “applicable to” or “configured to” herein means an open and inclusive expression, which does not exclude devices that are applicable to or configured to perform additional tasks or steps.

The term such as “about,” “substantially,” and “approximately” as used herein includes a stated value and an average value within an acceptable range of deviation of a particular value. The acceptable range of deviation is determined by a person of ordinary skill in the art, considering measurement in question and errors associated with measurement of a particular quantity (i.e., limitations of a measurement system).

The term such as “parallel,” “perpendicular,” or “equal” as used herein includes a stated condition and a condition similar to the stated condition. A range of the similar condition is within an acceptable deviation range, and the acceptable deviation range is determined by a person of ordinary skill in the art, considering measurement in question and errors associated with measurement of a particular quantity (i.e., the limitations of a measurement system).

In the related art, in a case where the air conditioner is operating in a heating mode, in order to perform defrosting of an outdoor heat exchanger, it is necessary to preset a temperature threshold and an accumulated heating time, and a controller located inside an outdoor unit completes a defrosting control process according to the temperature threshold, the accumulated heating time, and defrosting control logic.

However, a computing power of the controller is limited. In a case where complex defrosting logic operations are performed, the load of the controller is large, which increases the operating and maintenance cost of the outdoor unit.

It will be noted that the accumulated heating time may refer to heating time of the outdoor heat exchanger.

To solve the above problem, some embodiments of the present disclosure provide an air conditioner system 1.

FIG. 1 is a schematic diagram of an air conditioner system, in accordance with some embodiments.

In some embodiments, as shown in FIG. 1 , the air conditioner system 1 includes an air conditioner 1000 and a cloud platform 2000.

The air conditioner 1000 includes an outdoor unit 10 and an indoor unit 20. For example, the air conditioner 1000 includes one outdoor unit 10 and one indoor unit 20. Alternatively, the air conditioner 1000 may include one outdoor unit 10 and a plurality of indoor units 20, and the one outdoor unit 10 corresponds to the plurality of indoor units 20. Alternatively, the air conditioner 1000 may include a plurality of outdoor units 10 and a plurality of indoor units 20, and each outdoor unit 10 corresponds to two or more indoor units 20. The air conditioner 1000 further includes a compressor 101, and the compressor 101 may be disposed in the outdoor unit 10 or in the indoor unit 20. For ease of description, the following is mainly described by considering an example in which the compressor 101 is disposed in the outdoor unit 10.

The outdoor unit 10 is communicatively connected to the cloud platform 2000. The outdoor unit 10 is configured to collect and send operating parameters of the outdoor unit 10 and receive a first instruction sent by the cloud platform 2000. The operating parameters of the outdoor unit 10 at least include: the accumulated heating time, an outdoor ambient temperature, a relative humidity of an outdoor environment, a heat exchange pipe temperature, an exhaust temperature, and an exhaust pressure. The exhaust temperature is a temperature of a gaseous refrigerant discharged by the compressor 101. The exhaust pressure is a pressure of the gaseous refrigerant discharge by the compressor 101. The heat exchange pipe temperature is a temperature of a pipe in the outdoor unit 10 for refrigerant heat exchange.

FIG. 2 is a block diagram of an outdoor unit, in accordance with some embodiments.

In some embodiments, as shown in FIG. 2 , the outdoor unit 10 further includes a sensor 111, a communication device 112, and a controller 113.

The sensor 111 is configured to collect the operating parameters of the outdoor unit 10. For example, the sensor 111 is a temperature sensor, and is configured to collect the outdoor ambient temperature, the heat exchange pipe temperature, or the exhaust temperature. Alternatively, the sensor 111 is a pressure sensor and is configured to collect the exhaust pressure. Alternatively, the sensor 111 is other sensors. The outdoor unit 10 includes one or more sensors 111.

The communication device 112 is configured to send the operating parameters of the outdoor unit 10 to the cloud platform 2000 and receive the first instruction sent by the cloud platform 2000. The communication device 112 may be communicatively connected to the corresponding communication equipment in a wired or wireless manner.

In some embodiments, the communication device 112 may include a narrow band Internet of Things (NB-IoT) module (also referred to as a narrow band (NB) module), or a 4th Generation (4G) communication module or a 5th Generation (5G) communication module, so as to increase the reliability of data communication. In a case where the communication device 112 includes the NB-IoT module, the communication device 112 may be disposed in the outdoor unit 10. In a case where the communication device 112 includes the 4G communication module or the 5G communication module, the communication device 112 may be disposed outside the outdoor unit 10.

The controller 113 is configured to control the outdoor heat exchanger to perform defrosting or end defrosting according to the first instruction sent by the cloud platform 2000.

The controller 113 includes a processor. The processor may include a central processing unit (CPU), a microprocessor, or an application specific integrated circuit (ASIC) and may be configured to perform the corresponding operations described in the controller 113 when the processor executes a program stored in a non-transitory computer readable media coupled to the controller 113.

In some embodiments, the air conditioner system 1 may include one or more air conditioners 1000. The cloud platform 2000 in some embodiments of the present disclosure will be described below by considering an example in which the air conditioner system 1 includes one air conditioner 1000.

The cloud platform 2000 may include a plurality of servers. The cloud platform 2000 may provide products or solutions to users through the plurality of servers. For example, the cloud platform 2000 is deployed on the plurality of servers, and the cloud platform 2000 may virtualize resources (e.g., processors and storage) of the plurality of servers and deploy products or solutions provided to users on the virtualized resources.

The plurality of servers used to support the cloud platform 2000 may come from a same or different clusters or from a same or different data centers. This disclosure does not limit the source and geographical location of the plurality of servers. The server may be a rack mounted server or a blade server, and this disclosure does not limit the specific form of the servers.

In some embodiments, the cloud platform 2000 is configured to determine a defrosting decision according to the operating parameters of the outdoor unit 10 in a case where the air conditioner 1000 is in the heating mode and send the first instruction to the outdoor unit 10 according to the defrosting decision, so that the outdoor unit 10 performs defrosting or ends defrosting according to the first instruction.

The defrosting decision may be construed as the cloud platform 2000 determining that the outdoor unit 10 performs defrosting or ends defrosting. The first instruction includes a first sub-instruction and a second sub-instruction. The first sub-instruction instructs the outdoor unit 10 to start defrosting, and the second sub-instruction instructs the outdoor unit 10 to end defrosting.

In some embodiments, in a case where the operating parameters of the outdoor unit 10 satisfy a first preset condition, the cloud platform 2000 is further configured to send the first sub-instruction to the outdoor unit 10, so that the outdoor unit 10 may start defrosting according to the first sub-instruction. Here, the first preset condition may include a condition in which the outdoor unit 10 starts defrosting.

In some embodiments, the first preset condition includes a first preset sub-condition and a second preset sub-condition. In this case, if it is determined that the operating parameters of the outdoor unit 10 satisfy the first preset sub-condition and the second preset sub-condition, the cloud platform 2000 is further configured to send the first sub-instruction to the outdoor unit 10, so that the outdoor unit 10 starts defrosting according to the first sub-instruction.

The first preset sub-condition is as follows:

Tim_stp≥360−(120/5)×(Ta _(min)_slv−2).

Here, Tim_stp is the accumulated heating time of the outdoor unit 10, and the unit is minutes (min); Ta_(min)_slv is a minimum value (i.e., a minimum value of the outdoor ambient temperature) of a temperature of an environment where the outdoor unit 10 is located, and the unit is degrees Celsius (° C.).

In some embodiments, the first preset condition may include a plurality of second preset sub-conditions. For example, the first preset condition includes the following five second preset sub-conditions:

6≤Ta_slv and Te _(min)_slv≤TOFFSET_DEF;  (1).

−5<Ta_slv<6 and Te _(min)_slv≤(11×Ta_slv−107)/16+TOFFSET_DEF;  (2).

−10<Ta_slv≤−5 and Te _(min)_slv×(18×Ta_slv−70)/16+TOFFSET_DEF;  (3).

−20<Ta_slv≤−10 and Te _(min)_slv≤(17×Ta_slv−142)/21+TOFFSET_DEF;  (4).

Ta_slv≤−20 and Te _(min)_slv≤(17×Ta_slv−196)/21+TOFFSET_DEF.  (5).

Here, Ta_slv is the temperature (i.e., the outdoor ambient temperature) of the environment where the outdoor unit 10 is located, and Te_(min)_slv is a minimum value (i.e., the minimum value of the heat exchange pipe temperature) of the temperature of the pipe in the outdoor unit 10 for refrigerant heat exchange. TOFFSET_DEF is a humidity threshold of the relative humidity Toffset_def of the environment (i.e., the outdoor environment) where the outdoor unit 10 is located. In a case where the relative humidity Toffset_def of the outdoor environment is greater than 60%, the humidity threshold TOFFSET_DEF is equal to 2; in a case where the relative humidity Toffset_def of the outdoor environment is less than or equal to 60%, the humidity threshold TOFFSET_DEF is equal to 0.

In some embodiments, in a case where the operating parameters of the outdoor unit 10 satisfy a second preset condition, the cloud platform 2000 is further configured to send the second sub-instruction to the outdoor unit 10, so that the outdoor unit 10 ends defrosting according to the second sub-instruction. Here, the second preset condition may include a condition in which the outdoor unit 10 ends defrosting.

In some embodiments, a plurality of second preset conditions are preset in the cloud platform 2000. The plurality of second preset conditions each include one or more sub-conditions, and the one or more sub-conditions corresponding to one second preset condition have a priority relationship. In this case, if the operating parameters of the outdoor unit 10 satisfy any one of the plurality of second preset conditions, the cloud platform 2000 is further configured to send the second sub-instruction to the outdoor unit 10, so that the outdoor unit 10 ends defrosting according to the second sub-instruction.

Table 1 illustrates the plurality of second preset conditions. For example, as shown in Table 1, the plurality of second preset conditions include a first determining condition, a second determining condition, and a third determining condition.

The first determining condition mainly uses at least one of the minimum value Te_(min)_slv of the heat exchange pipe temperature, the relative humidity Toffset_def of the outdoor environment, time Tc when the outdoor unit 10 has performed defrosting, a maximum value Pd_(max)_slv of the exhaust pressure of the outdoor unit 10, or a maximum value Td_(max)_slv of the exhaust temperature of the outdoor unit 10 as a determining parameter. The first determining condition includes a plurality of first determining sub-conditions, and priorities of the plurality of first determining sub-conditions are different from each other, for example, priorities of the plurality of first determining sub-conditions are arranged in descending order, and the plurality of first determining sub-conditions are as follows:

Te _(min)_slv≥25° C. (i.e, a first preset relationship);  (1).

Toffset_def≤60% and Tc<2 min (i.e, a second preset relationship);  (2).

Toffset_def≤60% and Tc≥2 min and T1≥5 s and Pd _(max)_slv≥1.5 MPa (i.e, a third preset relationship);  (3).

Toffset_def≤60% and Jo=0 and Tc≥2 min and T2≥40 s (i.e, a fourth preset relationship);  (4).

Toffset_def≤60% and Tdmax_slv≥115° C. (i.e, a fifth preset relationship).  (5).

Here, Tc is time when the outdoor unit 10 has performed defrosting, Pd_(max)_slv is a maximum value of the exhaust pressure of the outdoor unit 10, and Td_(max)_slv is the maximum value of the exhaust temperature of the outdoor unit 10. T1 is a duration during which the minimum value Te_(min)_slv of the heat exchange pipe temperature is greater than or equal to 15° C. (i.e., a first preset temperature). T2 is a duration during which the minimum value Te_(min)_slv of the heat exchange pipe temperature is greater than or equal to 10° C. (i.e., a second preset temperature).

It will be noted that Jo is a preset value and may be set by the cloud platform 2000.

In a case where Jo is equal to zero, it means that one outdoor unit 10 is disposed in the air conditioner system 1.

The second determining condition mainly uses at least one of the time Tc when the outdoor unit 10 has performed defrosting or the maximum value Pd_(max)_slv of the exhaust pressure of the outdoor unit 10 as a determining parameter. The second determining condition includes a plurality of second determining sub-conditions, and priorities of the plurality of second determining sub-conditions are different from each other, for example, priorities of the plurality of second determining sub-conditions are arranged in descending order, and the plurality of second determining sub-conditions are as follows:

Tc<20 s and Pd _(max)_slv≥Pc+0.2 MPa (i.e, a sixth preset relationship);  (1).

Tc≥20 s and Pd _(max)_slv≥Pc MPa (i.e, a seventh preset relationship).  (2).

Here, Pc is a pressure threshold, and the unit is megapascals (MPa). For ease of description, the pressure threshold Pc may be referred to as a second pressure threshold, and a sum (i.e., Pc+0.2 MPa) of the pressure threshold Pc and a compensation value may be referred to as a first pressure threshold.

The third determining condition mainly uses time Tc when the outdoor unit 10 has performed defrosting as a determining parameter. The third determining condition is as follows: Tc≥29 min.

It will be noted that, in a case where the plurality of second preset conditions include a plurality of third determining conditions, priorities of the plurality of third determining conditions may also be arranged in descending order.

TABLE 1 First preset condition Sub-condition Note Temperature Te_(min) _(—) slv ≥ 25° C. Determined by the Condition cloud platform (First Toffset_def ≤ Tc < 2 min Determined by the determining 60% cloud platform condition) Tc ≥ 2 min and Determined by the T1 ≥ 5 s and cloud platform Pd_(max) _(—) slv ≥ 1.5 MPa Jo = 0 and Tc ≥ 2 In a case where Jo min and T2 ≥ 40 s is not equal to zero, the determining of the sub-condition is cancelled by the cloud platform Td_(max) _(—) slv ≥ 115° Determined by the C. cloud platform Pressure Tc < 20 s and Pd_(max) _(—) slv ≥ Determined by the Condition Pc + 0.2 MPa cloud platform (Second determining Tc ≥ 20 s and Pd_(max) _(—) slv ≥ Pc Determined by the condition) MPa cloud platform Time Tc ≥ 9 min Determined by the Conditions cloud platform (Third determining condition)

In some embodiments, the cloud platform 2000 obtains scene information, and determines an operating mode (e.g., the heating mode or the cooling mode) of the air conditioner 1000 according to the scene information. For example, the cloud platform 2000 obtains the plurality of operating parameters (e.g., the outdoor ambient temperature Ta_slv, the relative humidity Toffset_def of the outdoor environment, and the minimum value Te_(min)_slv of the heat exchange pipe temperature) of the outdoor unit 10 and fits the plurality of operating parameters, so as to determine the operating mode of the air conditioner 1000 and send a corresponding instruction.

In some embodiments, the cloud platform 2000 may also perform data information communication with an Internet of Things (IoT) management platform (also referred to as a smart home management platform), so as to obtain the scene information. The IoT management platform may be a cloud computer. The IoT management platform will be described below.

In the air conditioner system 1 provided in some embodiments of the present disclosure, the outdoor unit 10 collects and sends the operating parameters of the outdoor unit 10, and the cloud platform 2000 completes complex logic operations, so as to determine whether to perform defrosting or end defrosting, so that the problem of insufficient computing power of the controller 113 in the outdoor unit 10 and high management and maintenance cost of the outdoor unit 10 is solved, thereby improving the computing power, speed, and accuracy of the outdoor unit 10 for the complex logic operations and reducing the management and maintenance cost of the outdoor unit 10.

The above description is mainly given by considering an example in which the air conditioner system 1 includes one air conditioner 1000. Of course, in some embodiments, the air conditioner system 1 may also include a plurality of air conditioners 1000.

FIG. 3 is a schematic diagram of another air conditioner system, in accordance with some embodiments. As shown in FIG. 3 , the air conditioner system 1 includes the plurality of air conditioners 1000 and a cloud platform 2000.

The plurality of air conditioners 1000 include a plurality of outdoor units 10. The cloud platform 2000 is communicatively connected to the plurality of outdoor units 10. The plurality of outdoor units 10 receive the first instruction sent by the cloud platform 2000.

As shown in FIG. 2 , the plurality of outdoor units 10 each include a sensor 111, a communication device 112, and a controller 113. Structures and functions of the sensor 111, the communication device 112, and the controller 113 are similar to that described above, and details will not be repeated herein.

It will be noted that, in a case where the air conditioner system 1 includes the plurality of outdoor units 10, the communication device 112 is configured to send the operating parameters of the corresponding outdoor unit 10 to the cloud platform 2000 and receive the first instruction and a second instruction sent by the cloud platform 2000. The controller 113 is configured to control the corresponding outdoor unit 10 to perform defrosting or end defrosting according to the first instruction and the second instruction sent by the cloud platform 2000.

The cloud platform 2000 is configured to determine a heat exchange mode of the plurality of outdoor units 10 in a case where at least one of the plurality of air conditioners 1000 is in the heating mode, determine an alternate defrosting decision of the plurality of outdoor units 10 according to the heat exchange mode and the operating parameters of the plurality of outdoor units 10, and send the first instruction and the second instruction to the corresponding outdoor unit 10, so that the corresponding outdoor unit 10 performs defrosting or ends defrosting according to the first instruction and the second instruction.

The alternate defrosting decision may refer to that the cloud platform 2000 determines that the plurality of outdoor units 10 each perform defrosting or end defrosting. For the first instruction, reference may be made to the relevant content above, and details will not be repeated herein. After at least a portion of the plurality of outdoor units 10 receive the corresponding second instruction, and the portion of the plurality of outdoor units 10 performs defrosting or end defrosting. The function of the second instruction is the same as that of the first instruction. It will be noted that the second instruction refers to the first instruction sent by cloud platform 2000 to another outdoor unit 10 of the plurality of outdoor units 10 required to be defrosted other than a target outdoor unit. For ease of description, the first instruction corresponding to another outdoor unit 10 required to be defrosted other than the target outdoor unit is referred to as the second instruction. The target outdoor unit is an outdoor unit 10 of the plurality of outdoor units 10 required to be defrosted.

The heat exchange mode may refer to the operating modes of the plurality of outdoor units 10 in the air conditioner system 1. For example, at least one outdoor unit 10 of the plurality of outdoor units 10 performs cooling, and other outdoor units 10 perform heating. It will be noted that, in a case where the outdoor unit 10 is cooling, the corresponding air conditioner 1000 is in the heating mode; in a case where outdoor unit 10 is heating, the corresponding air conditioner 1000 is in the cooling mode.

In some embodiments, the cloud platform 2000 is further configured to determine a target outdoor unit according to the heat exchange mode.

If the operating parameters of the target outdoor unit satisfy a first preset condition, the cloud platform 2000 is further configured to send a first sub-instruction to the target outdoor unit, so that the target outdoor unit starts defrosting according to the first sub-instruction. For the first preset condition and the first sub-instruction, reference may be made to the relevant content above, and details will not be repeated herein.

If the operating parameters of the target outdoor unit satisfy a second preset condition, the cloud platform 2000 is further configured to send a second sub-instruction to the target outdoor unit, so that the target outdoor unit ends defrosting according to the second sub-instruction. For the second preset condition and the second sub-instruction, reference may be made to the relevant content above, and details will not be repeated herein.

If the cloud platform 2000 determines that the operating parameters of another outdoor unit 10 of the plurality of outdoor units required to be defrosted other than the target outdoor unit satisfy a third preset condition when the target outdoor unit finishes defrosting, the cloud platform 2000 is further configured to send the second instruction to the another outdoor unit 10.

As shown in Table 2, the third preset condition includes the following:

T3≥30 s;  (1).

T4≥20 s and Pdmax_COND≥3.05 MPa;  (2).

T4≥6 min;  (3).

Toffset_def≤20%.  (4).

Here, T3 is time when a heat exchange pipe temperature Te_COND of the target outdoor unit is greater than or equal to 15° C. (i.e., a third preset temperature). T4 is transition time of the heat exchange mode. For example, T4 is time (e.g., 5 s) to switch from a first heat exchange mode R1 to a second heat exchange mode R2. Pdmax_COND is a maximum value of the exhaust pressure of the target outdoor unit.

TABLE 2 Heat exchange mode Before After In a case where any of the following transition transition conditions are satisfied Joi Joi + 1 T3 ≥ 30 s T4 ≥ 20 s and Pdmax_COND ≥ 3.05 MPa T4 ≥ 6 min Toffset_def ≤ 20%

In some embodiments, in a case where the first preset condition includes a first preset sub-condition and a second preset sub-condition, if the operating parameters of the target outdoor unit satisfy the first preset sub-condition and the second preset sub-condition, the cloud platform 2000 is further configured to send the first sub-instruction to the target outdoor unit, so that the target outdoor unit starts defrosting according to the first sub-instruction. For the first preset sub-condition and the second preset sub-condition, reference may be made to the relevant content above, and details will not be repeated herein.

In some embodiments, a plurality of second preset conditions are preset in the cloud platform 2000. The plurality of second preset conditions each include one or more sub-conditions, and the one or more sub-conditions corresponding to one second preset condition have a priority relationship. In this case, if the operating parameters of the outdoor unit 10 satisfy any one of the plurality of second preset conditions, the cloud platform 2000 is further configured to send the second sub-instruction to the target outdoor unit, so that the target outdoor unit ends defrosting according to the second sub-instruction.

It will be noted that the plurality of second preset conditions are different from the plurality of second preset conditions described above. Here, since the air conditioner system 1 includes the plurality of outdoor units 10, among the first determining conditions included by the plurality of second preset conditions corresponding to the plurality of outdoor units 10, the first determining conditions each do not include the condition (4) (i.e., Toffset_def≤60% and Jo=0 and Tc≥2:2 min and T2≥40 s).

FIG. 4 is a diagram showing state changes of outdoor units during alternate defrosting of the outdoor units, in accordance with some embodiments.

As shown in FIG. 4 , in a case where the air conditioner system 1 includes a first outdoor unit 11, a second outdoor unit 12, a third outdoor unit 13, and a fourth outdoor unit 14, and the heat exchange mode includes four cases, such as a first heat exchange mode R1, a second heat exchange mode R2, a third heat exchange mode R3, and a fourth heat exchange mode R4.

In the first heat exchange mode R1, the first outdoor unit 11 is the target air conditioner, and the air conditioners 1000 corresponding to other outdoor units 10 each are in the heating mode. In the second heat exchange mode R2, the second outdoor unit 12 is the target air conditioner, and the air conditioners 1000 corresponding to other outdoor units 10 each are in the heating mode. In the third heat exchange mode R3, the third outdoor unit 13 is the target air conditioner, and the air conditioners 1000 corresponding to other outdoor units 10 each are in the heating mode. In the fourth heat exchange mode R4, the fourth outdoor unit 14 is the target air conditioner, and the air conditioners 1000 corresponding to other outdoor units 10 each are in the heating mode.

As shown in FIG. 4 , COND indicates that the outdoor unit 10 serves as a condenser, and a corresponding air conditioner 1000 is in the cooling mode, and EVAP indicates that the outdoor unit 10 serves as an evaporator, and a corresponding air conditioner 1000 is in the heating mode. During a transition from the first heat exchange mode R1 to the second heat exchange mode R2, the second outdoor unit 12 starts heating for defrosting. Meanwhile, the defrosting process of the first outdoor unit 11 has not been completely completed, and the first outdoor unit 11 may end heating after a period of time (e.g., 5 s).

It will be noted that, in a case where the air conditioner system 1 is provided with four outdoor units 10, the outdoor units 10 required to be defrosted may be one, two, or three outdoor units 10, as long as the air conditioner 1000 corresponding to at least one outdoor unit 10 is in the heating mode, so as to avoid affecting an indoor ambient temperature in a case where the air conditioner 1000 is defrosting. In some embodiments, the cloud platform 2000 obtains scene information and determines an operating mode (e.g., the heating mode or the cooling mode) of the air conditioner 1000 according to the scene information. For example, the cloud platform 2000 obtains the plurality of operating parameters (e.g., the outdoor ambient temperature Ta_slv, the relative humidity Toffset_def of the outdoor environment, and the minimum value Te_(min)_slv of the heat exchange pipe temperature) of the outdoor unit 10 and fits the plurality of operating parameters, so as to determine the operating mode of the air conditioner 1000 and send a corresponding instruction.

In the air conditioner system 1 provided in some embodiments of the present disclosure, the sensor 111 collects the operating parameters of the corresponding outdoor unit 10, the communication device 112 sends the operating parameters of the corresponding outdoor unit 10, and the cloud platform 2000 completes the complex logic operations, so as to determine the alternate defrosting decision and achieve the alternate defrosting of the plurality of outdoor units 10, so that the problem of insufficient computing power of the controllers 113 in the outdoor units 10 and high management and maintenance cost of the outdoor units 10 is solved, thereby improving the computing power, speed and accuracy of the outdoor units 10 for the complex logic operations and reducing the management and maintenance cost of the outdoor units 10.

Some embodiments of the present disclosure also provide a control method of an air conditioner system, and the method is applied to the above air conditioner system 1. The air conditioner system 1 is provided with one outdoor unit 10.

FIG. 5 is a flow chart of a control method of an air conditioner system, in accordance with some embodiments.

In some embodiments, as shown in FIG. 5 , the method includes step 11 to step 13.

In step 11, the sensor 111 collects the operating parameters of the outdoor unit 10, and the communication device 112 sends the operating parameters of the outdoor unit 10 and receives the first instruction sent by the cloud platform 2000.

In step 12, in a case where the air conditioner 1000 corresponding to the outdoor unit 10 is in the heating mode, the cloud platform 2000 determines the defrosting decision according to the operating parameters of the outdoor unit 10 and sends the first instruction to the outdoor unit 10 according to the defrosting decision.

In step 13, the outdoor unit 10 performs defrosting or ends defrosting according to the first instruction.

The defrosting decision includes the cloud platform 2000 determining that the outdoor unit 10 performs one of defrosting and ending defrosting, and the first instruction includes a first sub-instruction and a second sub-instruction. It will be noted that, for a determining method corresponding to the first sub-instruction and the second sub-instruction, reference may be made to the relevant content above, and details will not be repeated herein.

In the control method of the air conditioner system provided in some embodiments of the present disclosure, the sensor 111 collects the operating parameters of the outdoor unit 10, the communication device 112 sends the operating parameters of the corresponding outdoor unit 10, and the cloud platform 2000 completes the complex logic operations, so as to determine to perform defrosting or end defrosting, so that the problem of insufficient computing power of the controller 113 in the outdoor unit 10 and high management and maintenance cost of the outdoor unit 10 is solved, thereby improving the computing power, speed, and accuracy of the outdoor unit 10 for the complex logic operations and reducing the management and maintenance cost of the outdoor unit 10.

Some embodiments of the present disclosure also provide another control method of an air conditioner system, and the method is applied to the above air conditioner system 1. The air conditioner system 1 includes a plurality of outdoor units 10.

FIG. 6 is a flow chart of another control method of an air conditioner system, in accordance with some embodiments.

In some embodiments, as shown in FIG. 6 , the method includes step 21 to step 23.

In step 21, a plurality of sensors 111 collect the operating parameters of the plurality of outdoor units 10, and a plurality of communication devices 112 send the operating parameters of the plurality of outdoor units 10 and receive the first instruction and the second instruction sent by the cloud platform 2000.

In step 22, in a case where at least one of the plurality of air conditioners 1000 corresponding to the plurality of outdoor units 10 is in the heating mode, the cloud platform 2000 determines the heat exchange mode of the plurality of outdoor units 10, determines the alternate defrosting decision of the plurality of outdoor units 10 according to the heat exchange mode and the operating parameters of the plurality of outdoor units 10, and sends the first instruction and the second instruction to the corresponding outdoor unit 10.

In step 23, the corresponding outdoor unit 10 performs defrosting or ends defrosting according to the first instruction and the second instruction.

The alternate defrosting decision includes the cloud platform 2000 determining that the plurality of outdoor units 10 each perform one of defrosting and ending defrosting. The first instruction includes the first sub-instruction and the second sub-instruction. It will be noted that, for a specific content of the relevant steps in the method, reference may be made to the relevant content above, and details will not be repeated herein.

In the control method of the air conditioner system provided by some embodiments of the present disclosure, the plurality of sensors 111 collect the operating parameters of the plurality of outdoor units 10, the plurality of communication devices 112 send the operating parameters of the plurality of outdoor units 10, and the cloud platform 2000 completes the complex logic operations, so as to determine the alternate defrosting decision and achieve the defrosting of the plurality of outdoor units 10, so that the problem of insufficient computing power of the controllers 113 in the outdoor units 10 and high management and maintenance cost of the outdoor units 10 is solved, thereby improving the computing power, speed, and accuracy of the outdoor units 10 for the complex logic operations and reducing the management and maintenance cost of the outdoor units 10.

The above description is mainly given by considering an example in which the air conditioner system 1 includes one or more air conditioners 1000 and the cloud platform 2000. Of course, the air conditioner system 1 may also have other structures. Some embodiments of the present disclosure also provide another air conditioner system 1.

FIG. 7 is a schematic diagram of yet another air conditioner system, in accordance with some embodiments.

As shown in FIG. 7 , in addition to an air conditioner 1000 and a cloud platform 2000, the air conditioner system 1 further includes a cloud management platform 3000. For the air conditioner 1000 and the cloud platform 2000, reference may be made to the relevant content above, and details will not be repeated herein. The cloud management platform 3000 is communicatively connected to the outdoor unit 10, and the cloud platform 2000 is communicatively connected to the cloud management platform 3000.

The sensor 111 in the outdoor unit 10 is configured to collect operating parameters of the outdoor unit 10, and the communication devices 112 in the outdoor unit 10 is configured to send the operating parameters of the outdoor unit 10 and receive a third instruction. The third instruction includes a heating control constant and a cooling control constant calculated by the cloud platform 2000 according to the operating parameters. The heating control constant and the cooling control constant will be described below. The target parameter may refer to a maximum value of a target current of the outdoor unit 10 or a maximum value of a target frequency of a compressor 101. For the compressor 101, reference may be made to the relevant content above, and details will not be repeated herein.

During the operation of the air conditioner 1000, an actual current of the outdoor unit 10 or an actual frequency of the compressor 101 is not stable and constant, and the actual current or the actual frequency fluctuates over time. Therefore, the actual current of the outdoor unit 10 or the actual frequency of the compressor 101 has a maximum value. As a result, by providing the maximum value of the target current or the maximum value of the target frequency, it is possible to limit the maximum value of the actual current of the outdoor unit 10 or the maximum value of the actual frequency of the compressor 101, so as to control the operating state of the compressor 101, thereby controlling the energy consumption of the air conditioner 1000.

It will be noted that, since the operating frequency of compressor 101 may be controlled by controlling the current of outdoor unit 10, the target parameter may include the maximum value of the above target current of the outdoor unit 10. For ease of description, the following is described by considering an example in which the target parameter is set as the maximum value of the target frequency of compressor 101. In addition, the defrosting or alternate defrosting control method in the above air conditioner system may also be applied to the air conditioner system 1.

The cloud management platform 3000 is configured to receive the operating parameters of the outdoor unit 10, send the operating parameters, receive the third instruction, send the third instruction to the outdoor unit 10, and control the operating mode (e.g., the heating mode or the cooling mode) of the air conditioner 1000.

In some embodiments, as shown in FIG. 7 , the cloud management platform 3000 includes an IoT management platform 60 and a server 50. The IoT management platform 60 is communicatively connected to the outdoor unit 10 and is configured to perform information interaction with the outdoor unit 10, receive the operating parameters of the outdoor unit 10, and send the operating parameters of the outdoor unit 10 to the cloud platform 2000. The server 50 is communicatively connected to the cloud platform 2000 and the IoT management platform 60, and the server 50 is configured to perform human-computer interaction and update and maintain a database. For example, the user sends an operation instruction to the cloud platform 2000 or the IoT management platform 60 through the server 50, so as to control the cloud platform 2000 or the IoT management platform 60 and obtain the operating parameters of the outdoor unit 10. The database may be created by the cloud platform 2000 and stored in the cloud platform 2000.

In some embodiments, the server 50 may be an independent physical server. Alternatively, the server 50 may also be a server group or a distributed system composed of a plurality of physical servers. Alternatively, the server 50 may also be a cloud server providing basic cloud computing services such as cloud services and cloud databases.

The cloud platform 2000 is also configured to perform a target calculation of the outdoor unit 10 according to the operating parameters of the outdoor unit 10 and send the third instruction to the cloud management platform 3000, so as to send the third instruction to the corresponding outdoor unit 10 through the cloud management platform 3000, so that the outdoor unit 10 reduces the maximum value of the target frequency of the compressor 101 according to the third instruction, and the maximum value of the actual frequency of the compressor 101 may satisfy the target frequency, thereby achieving energy conservation of the air conditioner system 1.

The target operation may be construed as an operation (e.g., calculating the maximum value of the target frequency of the compressor 101) performed to reduce the maximum value of the actual frequency of the compressor 101. By limiting the maximum value of the target frequency of the compressor 101, it is possible to reduce the maximum value of the actual frequency of the compressor 101, thereby achieving energy conservation of the air conditioner system 1. In addition, it will be noted that, the maximum value of the actual frequency of the compressor 101 satisfies the target frequency means that the maximum value of the actual frequency is substantially equal to the maximum value of the target frequency.

In some embodiments, the cloud platform 2000 is further configured to: call the database; train data models of the heating control constant and the cooling control constant; correct the data models according to latest data collected (e.g., the latest operating parameters of the outdoor unit 10); send a target configuration to the outdoor unit 10 according to a model set by the user, or historical data of the user; receive the operation instruction sent by the server 50; and send the data models of the heating control constant and the cooling control constant to the server 50. The target configuration may refer to a target value that the target parameter is required to reach. For example, the maximum value of the target frequency is set as 80% of the previous maximum value of the actual frequency.

In some embodiments, the outdoor unit 10 includes a sensor 111, a communication device 112, and a controller 113. Structures and functions of the sensor 111, the communication device 112, and the controller 113 are similar to the relevant content above, and details will not be repeated herein.

It will be noted that, in a case where the air conditioner system 1 includes the cloud management platform 3000, and the communication device 112 is configured to perform information interaction with the IoT management platform 60, send the operating parameters of the outdoor unit 10, and receive the third instruction from the cloud platform 2000. Moreover, the controller 113 is configured to control the maximum value of the target frequency of the compressor 101 according to the third instruction.

FIG. 8 is a block diagram of an IoT management platform, in accordance with some embodiments.

In some embodiments, as shown in FIG. 8 , the IoT management platform 60 includes a communication interface 601 and a service gateway 602.

The communication interface 601 is configured to maintain an access state of the outdoor unit 10, receive the third instruction sent by the cloud platform 2000, and send the third instruction to the corresponding outdoor unit 10.

For example, after the operating parameters of the outdoor unit 10 are sent to the cloud platform 2000, the outdoor unit 10 is communicatively connected to the IoT management platform 60 through the communication interface 601, and the outdoor unit 10 immediately enters a receiving state (i.e., the access state), so as to receive the third instruction sent by the cloud platform 2000.

The communication interface 601 is configured to communicate with other devices or communication networks. The communication interface 601 may be a module, a circuit, a transceiver, or any device capable of achieving communication.

The service gateway 602 is configured to receive the operating parameters of the outdoor unit 10, send the operating parameters to the cloud platform 2000, receive an operating instruction sent by the server 50, and send the operating parameters of the outdoor unit 10 to the server 50.

For example, the service gateway 602 includes a central controller, and the central controller is disposed on a bus between the indoor unit 20 and the outdoor unit 10. The central controller is provided with a wireless communication module, so that the service gateway 602 may be directly and communicatively connected to the cloud platform 2000 through the wireless communication module.

In some embodiments, the air conditioner system 1 uses a NB-IoT technology for communication.

For example, the central controller included by the service gateway 602 is provided with a NB module, so as to achieve the NB-IoT communication through the NB module.

A coverage rate of a base station of the NB-IoT is high, and the manufacturing cost and the operating and maintenance cost of the base station of the NB-IoT are low, and a sector of the base station of the NB-IoT may support communication connections of a plurality of terminals, so that interference among users is small.

Generally, the user needs to manually operate to establish a connection between the terminal and the cloud platform 2000 through Wi-Fi. However, Wi-Fi usually uses a 2.4 G frequency band, and the frequency band is prone to interference and has a small coverage region. The use of the NB-IoT communication into the cloud may avoid the above problem.

In some embodiments of the present disclosure, by providing the NB-IoT module, the air conditioner system 1 may communicate through the NB-IoT, which expands the communication manner of the network and avoids the problem of low activation rate of the communication module. Moreover, by providing the cloud platform 2000 to perform complex algorithm operations, it is possible to reduce the load and cost of the controller 113, so that the air conditioner 1000 may be remotely controlled to reduce the maximum value of the target frequency, thereby satisfying demand of the user.

Since the IoT management platform 60 adopts the NB-IoT technology, the IoT management platform 60 may also be referred to as a NB-IoT management platform. The NB-IoT management platform adopts ultra narrow band technologies, and may collect the operating parameters of the outdoor unit 10 multiple times, and send the third instruction to the outdoor unit 10 multiple times. In addition, a transmission control protocol/internet protocol (TCP/IP) of the NB-IoT is simple, and the NB-IoT has characteristics of low-power wide-area network (LPWAN). The characteristics mainly include the following:

-   -   (1). the IoT management platform 60 has high throughput, the IoT         management platform 60 using the NB-IoT technology may support         100 million user access;     -   (2). the IoT management platform 60 may perform asynchronous         control and data collection, so as to improve the effect of         disaster tolerance.

For example, the third instruction in some embodiments of the present disclosure may be sent by a background (e.g., the cloud platform 2000). As long as the air conditioner 1000 sends the corresponding data information (e.g., the operating parameters of the outdoor unit 10), the background may automatically send the third instruction according to a preset algorithm, thereby achieving the asynchronous control. Moreover, the air conditioner system 1 using the NB-IoT may also avoid a period of time of network congestion and improve the effect of disaster tolerance.

Due to various application scenarios for the NB-IoT and the high cost of management and maintenance of a unit composed of a plurality of air conditioners 1000, the IoT management platform 60 needs big data to maintain and control the unit composed of the plurality of air conditioners 1000, so as to satisfy the demand of the user.

It will be noted that, in some embodiments of the present disclosure, the air conditioner system 1 adopts the NB-IoT communication. Of course, in some embodiments of the present disclosure, other communication may also be adopted.

FIG. 9 is a schematic diagram showing a topology and a data stream of an air conditioner system, in accordance with some embodiments.

As shown in FIG. 9 , the cloud platform 2000 obtains the operating parameters of the outdoor unit 10 through the NB-IoT, determines the third instruction through its own strong computing power, and sends the third instruction to the corresponding outdoor unit 10.

The operating parameters of the outdoor unit 10 may include a temperature detected by a temperature sensor, a pressure detected by a pressure sensor, a gear of an indoor fan, a gear of an outdoor fan, or a frequency of the compressor 101 (e.g., the target frequency or the actual frequency).

The temperature detected by the temperature sensor may include an outlet air temperature, a return air temperature, a gas pipe temperature, and a liquid pipe temperature of the outdoor unit 10. The outlet air temperature is a temperature of the air flowing out from an air outlet of the outdoor unit 10. The return air temperature is a temperature of the air flowing into a return air outlet of the outdoor unit 10. The gas pipe temperature is a temperature of a pipe with gaseous refrigerant near an expansion valve. The liquid pipe temperature is a temperature of a pipe with liquid refrigerant near the outdoor heat exchanger.

In some embodiments, the cloud platform 2000 is configured to calculate the heating control constant Pdomax and the cooling control constant Teomin and send the heating control constant Pdomax and the cooling control constant Teomin to the outdoor unit 10, so that the outdoor unit 10 may adjust the maximum value of the target frequency of the compressor 101, and the maximum value of the actual frequency of the compressor 101 may satisfy the target frequency.

How the cloud platform 2000 calculates the heating control constant Pdomax is described below.

The cloud platform 2000 obtains a maximum value Pcomax of a saturation pressure according to a maximum value Tcomax of a condensing temperature in a case where the outdoor unit 10 is heating and uses a control target value KPd_Hh to correct the maximum value Pcomax of the saturation pressure, so as to calculate the heating control constant Pdomax. The heating control constant Pdomax may be calculated by the following formula (1).

Pdomax=Pcomax+KPd_Hh(2.20≤Pdomax≤2.95)  (1)

It will be noted that, in a case where the outdoor unit 10 is not heating, Pdomax is equal to Pdomaxc (i.e., Pdomax=Pdomaxc). Pdomaxc is a maximum value of a pressure of the gaseous refrigerant discharged from the compressor 101 in a case where the outdoor unit 10 is cooling (e.g., the outdoor unit 10 is used as an evaporator). The maximum value Pcomax of the saturation pressure may be calculated according to the maximum value Tcomax of the condensing temperature. The maximum value Pcomax of the saturation pressure may be determined according to a corresponding relationship between the pressure and the saturation temperature, and in a case where a same saturation temperature corresponds to a plurality of pressures, the lowest pressure is selected as the maximum value Pcomax of the saturation pressure.

The maximum value Tcomax of the condensing temperature is a maximum value of a target condensing temperature Tco in a case where the outdoor unit 10 is heating, and the target condensing temperature Tco may be calculated by the following formula (2).

Tco={Tir×3+(Ts+Ts_rev)×2+(Taave−7)+360}/10  (2)

During a trial operation of the air conditioner 1000, a sum of Ts and Ts_rev is set as a constant value (e.g., 34° C.).

Ta is an outdoor ambient temperature.

Taave is an average of the outdoor ambient temperature.

A first set parameter Hh refers to a parameter set by the cloud platform 2000 that may be saved in an electrically erasable programmable read only memory (EEPROM) of the outdoor unit 10 in a case where the outdoor unit 10 is heating.

Ts is an indoor ambient temperature set by the user through a wire controller.

Ts_rev is a corrected value of the set indoor ambient temperature.

Tir is the outlet air temperature.

KPd_Hh is the control target value and is used to correct the heating control constant Pdomax.

TABLE 3 Hh 0 1 2 3 4 5 6 7 KPd_Hh 0.0 −0.15 −0.10 −0.05 −0.03 0.03 0.05 0.10

However, when a command value DEMAND is valid (that is, the command value DEMAND is any value within a range of 40% to 100%), the heating control constant Pdomax may be calculated by the following formula (3).

Pdomax=Pdomax−(1−Ks/100)(Pdomax≥2.20)  (3)

Here, Ks is the command value DEMAND set by the user, and the command value is a percentage.

It will be noted that, the command value DEMAND is an instruction sent by the cloud platform 2000, the greater the command value DEMAND is, the more the maximum value of the corresponding target frequency decreases, the less the maximum value of the corresponding target frequency is.

How the cloud platform 2000 calculates the cooling control constant Teomin is described below.

In some embodiments, in a case where the air conditioner 1000 is in the heating mode, the outdoor unit 10 is used as an evaporator. In this case, a calculation method for a minimum evaporation temperature (i.e., a minimum value of a target evaporation temperature Teo) of the outdoor unit 10 is as follows.

In a case where a second set parameter Hc (i.e., a set parameter) is equal to zero (i.e., a first preset value), in a case where the air conditioner 1000 is in the heating mode and the outdoor unit 10 is used as the evaporator, a minimum value of a target evaporation temperature Teo of the outdoor unit 10 is the cooling control constant Teomin.

It will be noted that, if the outdoor unit 10 is not cooling, the cooling control constant Teomin is set as 14. The target evaporation temperature Teo is a set target value of the evaporation temperature. The second set parameter Hc refers to a parameter set by the cloud platform 2000 that may be saved in the EEPROM of the outdoor unit 10 in a case where the outdoor unit 10 is cooling.

The target evaporation temperature Teo of the outdoor unit 10 may be calculated by the following formula (4).

Teo={(Ts+Ts_rev)×2+Tir×3−30}/10  (4)

During the trial operation of the air conditioner 1000, a sum of Ts and Ts_rev is set as a constant value (e.g., 17° C. or 8° C.).

In this case, Teomin is less than or equal to 14 (e.g., Teomin≤14).

In a case where the second set parameter Hc is equal to any value (i.e., a second preset value) within a range of 1 to 13, the value of Teomin is as shown in Table 4.

TABLE 4 Hc 1 2 3 4 5 6 7 8 9 10 11 12 13 Teomin 6 7 8 9 10 11 12 13 14 2 3 4 5

However, in a case where the command value DEMAND is valid (that is, the command value DEMAND is any value within a range of 40% to 100%), Teomin may be calculated by the following formula (5).

Teomin=Teomin+10×(1−Ks/100)  (5)

Here, the cooling control constant Teomin is less than or equal to 14.

By the above formulas, the cloud platform 2000 may determine the heating control constant Pdomax and the cooling control constant Teomin and send the heating control constant Pdomax and the cooling control constant Teomin to the corresponding outdoor unit 10, so that the maximum value of the target frequency of the compressor 101 may be adjusted through the controller, and the maximum value of the actual frequency of the compressor 101 may satisfy the target frequency.

In some embodiments, different command values DEMAND correspond to different third instructions. For example, as shown in Table 5, in a case where the command value DEMAND is any value within a range of 40% to 100%, the cloud platform 2000 sends the third instruction and establishes a user model according to a model set by the user or the historical data of the user.

TABLE 5 A range of Situations of a third instruction sent by a cloud DEMAND [%] platform 2000 0 The cloud platform 2000 does not send the third instruction, and the cloud platform 2000 establishes a user model 1 to 30 The cloud platform 2000 sends the third instruction, and the cloud platform 2000 establishes the user model 40 to 100 The cloud platform 2000 sends the third instruction, and the cloud platform 2000 establishes the user model Other The cloud platform 2000 sends the third instruction according to a model set by a user or historical data of a user

In some embodiments, data stream details of the air conditioner system 1 are shown in Table 6. Here, message numbers in Table 6 may represent an execution sequence of the corresponding steps.

TABLE 6 Message number Explanation 1 After an outdoor unit 10 is powered on, operating parameters of the outdoor unit 10 are collected and sent to a cloud management platform 3000. 2 The cloud management platform 3000 sends the collected operating parameters of the outdoor unit 10 to a cloud platform 2000. 3 (1). The cloud platform 2000 calls a database to train data models of a heating control constant Pdomax and a cooling control constant Teomin. (2). The cloud platform 2000 continues to correct the data models according to the operating parameters of the outdoor unit 10. (3). The cloud platform 2000 selects user settings, or automatically selects user habits, and sends a target configuration. 4 The cloud management platform 3000 sends the target configuration to the outdoor unit 10

FIG. 10 is a schematic diagram showing architecture and a data stream of a cloud management platform, in accordance with some embodiments.

As shown in FIG. 10 , some embodiments of the present disclosure may achieve the functions of collecting the operating parameters of the outdoor unit 10 and sending the collected operating parameters to the cloud platform 2000 by using the outdoor unit 10 equipped with an adapter of a NB-IoT protocol. According to the operating parameters of the outdoor unit 10, the cloud platform 2000 may send the third instruction to the corresponding outdoor unit 10 after calculation, so that the corresponding outdoor unit 10 may execute the third instruction, so as to reduce the maximum value of the target frequency of the compressor 101.

FIG. 10 shows a message flow of communication between the outdoor unit 10 connected to NB-IoT and the background. It will be noted that a device of the background may be an application (APP) of a mobile terminal or a personal computer (PC). Of course, the present disclosure is not limited thereto, and other background access methods may also be used. The background is an operable interface for the user.

FIG. 10 shows an architecture of the air conditioner system 1, and the architecture is based on the NB IoT technology for data stream transmission. In the air conditioner system 1, the IoT management platform (including a service gateway and a positioning interface) and the background constitute a core portion of the cloud management platform 3000. The positioning interface (e.g., a communication interface) may be used for the positioning of the outdoor unit 10 of air conditioner 1000.

It will be noted that the outdoor unit 10 in the air conditioner 1000 in FIG. 10 has a sensor and an NB-IoT module, and the NB-IoT module may be installed inside an electric control box of the outdoor unit 10.

A base station refers to a base station of a mobile phone of an operator.

A core network refers to a core network of the operator.

The IoT management platform 60 is one of the cores of the cloud management platform 3000.

The server 50 refers to a service server used for background services.

A web page may refer to a management platform used to provide a visual management interface.

In some embodiments of the present disclosure, a service data stream in the air conditioner system d is shown in Table 7. Here, message numbers in Table 7 may represent an execution sequence of the corresponding steps.

TABLE 7 Message number Explanation 1 After an outdoor unit 10 is powered on, data (e.g., operating parameters of the outdoor unit 10) is sent 2 A base station sends data to a core network 3 The core network reports the data to an IoT management platform 60 4 The IoT management platform 60 receives the data and sends the latest data to a background 5 When a cloud platform 2000 finds that any air conditioner 1000 has new data, updates a database to the latest data immediately 6 After the data is sent to the cloud platform 2000 for a decision, the cloud platform 2000 immediately starts a new thread to send a target configuration to the outdoor unit 10, and the target configuration passes through the core network; for the data stream of the cloud platform 2000, reference may be made to the relevant content in Table 6 7 After the data is sent to the cloud platform 2000 for a decision, a new thread is immediately used to send a target configuration to the outdoor unit 10, and the target configuration passes through the core network 8 The base station starts calling the outdoor unit 10 and sends an instruction, and the air conditioner 1000 replies an acknowledge character (ACK) 9 The base station sends the ACK replied by the air conditioner 1000 to the core network 10 The core network sends the replied ACK to the IoT management platform 60 11 The background may obtain all information of the outdoor units 10 in the IoT management platform 60

Some embodiments of the present disclosure also provide yet another control method of an air conditioner system, and the method is applied to the above air conditioner system 1.

FIG. 11 is a flow chart of yet another control method of an air conditioner system, in accordance with some embodiments.

In some embodiments, as shown in FIG. 11 , the method includes step 31 to step 35.

In step 31, operating parameters of the outdoor unit 10 are collected and sent.

For example, a sensor 111 collects the operating parameters of the outdoor unit 10, and a communication device 112 performs information interaction with an IoT management platform 60, so as to send the operating parameters of the outdoor unit 10 to the IoT management platform 60.

In step 32, a cloud management platform 3000 receives the operating parameters of the outdoor unit 10 and sends the operating parameters to a cloud platform 2000.

In step 33, the cloud platform 2000 performs a target calculation of the outdoor unit 10 according to the operating parameters of the outdoor unit 10 and sends a third instruction to the cloud management platform 3000.

In step 34, the cloud management platform 3000 sends the third instruction to the corresponding outdoor unit 10.

In step 35, the outdoor unit 10 adjusts a maximum value of a target frequency of a compressor 101 according to the third instruction, so that a maximum value of an actual frequency of the compressor 101 may satisfy the target frequency.

For example, a controller 113 adjusts the maximum value of the target frequency of the compressor 101 of the outdoor unit 10 according to the third instruction, so that the maximum value of the actual frequency of the compressor 101 may satisfy the target frequency.

It will be noted that, for the calculation method for a heating control constant and a cooling control constant included by the third instruction, reference may be made to the relevant content above, and details will not be repeated herein.

FIG. 12 is a flow chart of yet another control method of an air conditioner system, in accordance with some embodiments.

In some embodiments, as shown in FIG. 12 , the step 33 includes step 331 to step 334.

In step 331, the cloud platform 2000 calls a database, and trains data models of a heating control constant and a cooling control constant.

It will be noted that the database may be created by the cloud platform 2000 and stored in the cloud platform 2000.

In step 332, the cloud platform 2000 corrects the data models according to the latest operating parameters of the outdoor unit 10 collected.

In step 333, the cloud platform 2000 sends a target configuration to the outdoor unit 10 according to a model set by the user or historical data of the user.

In step 334, the cloud platform 2000 receives operation instructions sent by a server 50 and sends the data models of the outdoor unit 10 to the server 50.

FIG. 13 is a flow chart of yet another control method of an air conditioner system, in accordance with some embodiments.

In some embodiments, as shown in FIG. 13 , the step 32 includes step 321 and step 322.

In step 321, the IoT management platform 60 performs information interaction with the outdoor unit 10, receives the operating parameters of the outdoor unit 10, and sends the operating parameters to the cloud platform 2000.

For example, a communication interface 601 maintains an access state of the outdoor unit 10. After the operating parameters of the outdoor unit 10 are sent to the cloud platform 2000, the communication interface 601 makes the outdoor unit 10 enter a receiving state (e.g., the access state) immediately, so as to receive the third instruction sent by the cloud platform 2000. The communication interface 601 receives the third instruction sent by the cloud platform 2000 and sends the third instruction to the outdoor unit 10.

A service gateway 602 receives the operating parameters sent by the outdoor unit 10 and sends the operating parameters to the cloud platform 2000.

The service gateway 602 receives the operation instructions sent by the server 50 and sends the operating parameters of the outdoor unit 10 to the server 50.

In step 322, the server 50 performs human-computer interaction and updates and maintains the database.

For example, people send the operation instructions to the cloud platform 2000 or the IoT management platform 60 through the server 50, so as to control the cloud platform 2000 or the IoT management platform 60 and obtain the operating parameters of the outdoor unit 10.

In some embodiments of the present disclosure, by combining the IoT and cloud platform technologies, the control method of the air conditioner system has the characteristics of good sensitivity, and high accuracy. The method may also be applied to the monitoring of indoor environment.

A person skilled in the art will understand that the scope of disclosure in the present disclosure is not limited to specific embodiments discussed above and may modify and substitute some elements of the embodiments without departing from the spirits of this application. The scope of this application is limited by the appended claims. 

What is claimed is:
 1. An air conditioner system, comprising: at least one air conditioner including an indoor unit and an outdoor unit; and a cloud platform communicatively connected to the outdoor unit, the cloud platform being configured to: in a case where the air conditioner is in a heating mode, determine the outdoor unit to perform one of defrosting and ending defrosting according to operating parameters of the outdoor unit; if determining that the operating parameters satisfy a first preset condition, send a first sub-instruction to the outdoor unit, so that the outdoor unit starts defrosting according to the first sub-instruction; and if determining that the operating parameters satisfy any one of a plurality of second preset conditions, send a second sub-instruction to the outdoor unit, so that the outdoor unit ends defrosting according to the second sub-instruction; wherein the plurality of second preset conditions include: a first determining condition, the first determining condition including using at least one of a minimum value of a heat exchange pipe temperature, a relative humidity of an outdoor environment, time when the outdoor unit has performed defrosting, a maximum value of an exhaust pressure of the outdoor unit, or a maximum value of an exhaust temperature of the outdoor unit as a determining parameter; a second determining condition, the second determining condition including using at least one of the time when the outdoor unit has performed defrosting or the maximum value of the exhaust pressure of the outdoor unit as a determining parameter; and a third determining condition, the third determining condition including using the time when the outdoor unit has performed defrosting as a determining parameter.
 2. The air conditioner system according to claim 1, wherein the first preset condition includes a first preset sub-condition and a second preset sub-condition, and the cloud platform is further configured to: if the operating parameters of the outdoor unit satisfy the first preset sub-condition and the second preset sub-condition, send the first sub-instruction to the outdoor unit, so that the outdoor unit starts defrosting according to the first sub-instruction; wherein the first preset sub-condition includes a relationship between an accumulated heating time of the outdoor unit and a minimum value of an outdoor ambient temperature; the second preset sub-condition includes the outdoor ambient temperature that meets a target condition, a relationship among the minimum value of the heat exchange pipe temperature, the outdoor ambient temperature, and a humidity threshold of the relative humidity of the outdoor environment.
 3. The air conditioner system according to claim 1, wherein the first determining condition includes a plurality of first determining sub-conditions, and priorities of the plurality of first determining sub-conditions are different from each other; the second determining condition includes a plurality of second determining sub-conditions, and priorities of the plurality of second determining sub-conditions are different from each other; the plurality of first determining sub-conditions include: a first preset relationship including the minimum value of the heat exchange pipe temperature; a second preset relationship including the relative humidity of the outdoor environment and the time when the outdoor unit has performed defrosting; a third preset relationship including the relative humidity of the outdoor environment, the time when the outdoor unit has performed defrosting, a duration during which the minimum value of the heat exchange pipe temperature is greater than or equal to a first preset temperature, and the maximum value of the exhaust pressure of the outdoor unit; a fourth preset relationship including the relative humidity of the outdoor environment, the time when the outdoor unit has performed defrosting, and a duration during which the minimum value of the heat exchange pipe temperature is greater than or equal to a second preset temperature; the second preset temperature being less than the first preset temperature; and a fifth preset relationship including the relative humidity of the outdoor environment and the maximum value of the exhaust temperature of the outdoor unit; priorities of the first preset relationship, the second preset relationship, the third preset relationship, the fourth preset relationship, and the fifth preset relationship being arranged in descending order; the plurality of second determining sub-conditions include: a sixth preset relationship including the time when the outdoor unit has performed defrosting, the maximum value of the exhaust pressure of the outdoor unit, and a first pressure threshold; and a seventh preset relationship including the time when the outdoor unit has performed defrosting, the maximum value of the exhaust pressure of the outdoor unit, and a second pressure threshold; priorities of the sixth preset relationship and the seventh preset relationship being arranged in descending order.
 4. The air conditioner system according to claim 1, wherein the outdoor unit includes: a sensor configured to collect the operating parameters of the outdoor unit; a communication device configured to send the operating parameters of the outdoor unit to the cloud platform and receive the first sub-instruction and the second sub-instruction sent by the cloud platform; and a controller configured to control the outdoor unit to perform defrosting according to the first sub-instruction and control the outdoor unit to end defrosting according to the second sub-instruction.
 5. The air conditioner system according to claim 1, wherein the at least one air conditioner includes a plurality of air conditioners, the cloud platform is communicatively connected to a plurality of outdoor units in the plurality of air conditioners, and the cloud platform is configured to: in a case where at least one of the plurality of air conditioners is in the heating mode, determine a heat exchange mode of the plurality of outdoor units and determine an alternate defrosting decision of the plurality of outdoor units according to the heat exchange mode and the operating parameters of the plurality of outdoor units; the alternate defrosting decision including the cloud platform determining that the plurality of outdoor units each perform one of defrosting and ending defrosting; send a first instruction and a second instruction to a corresponding outdoor unit, so that the corresponding outdoor unit performs one of defrosting and ending defrosting according to the first instruction and the second instruction; the first instruction including the first sub-instruction and the second sub-instruction.
 6. The air conditioner system according to claim 5, wherein the cloud platform is further configured to: determine a target outdoor unit according to the heat exchange mode; if the operating parameters of the target outdoor unit satisfy the first preset condition, send the first sub-instruction to the target outdoor unit, so that the target outdoor unit starts defrosting according to the first sub-instruction; the target outdoor unit being an outdoor unit of the plurality of outdoor units required to be defrosted; if the operating parameters of the target outdoor unit satisfy the second preset condition, send the second sub-instruction to the target outdoor unit, so that the target outdoor unit ends defrosting according to the second sub-instruction; and if the operating parameters of another outdoor unit of the plurality of outdoor units other than the target outdoor unit satisfy a third preset condition when the target outdoor unit finishes defrosting, send the second instruction to the another outdoor unit; the third preset condition includes using at least one of time when the heat exchange pipe temperature of the target outdoor unit is greater than or equal to a third preset temperature, transition time of the heat exchange mode, a maximum value of the exhaust pressure of the target outdoor unit, or the relative humidity of the outdoor environment as a determining parameter.
 7. The air conditioner system according to claim 6, wherein the first preset condition includes a first preset sub-condition and a second preset sub-condition, and the cloud platform is further configured to: if the operating parameters of the outdoor unit satisfy the first preset sub-condition and the second preset sub-condition, send the first sub-instruction to the outdoor unit, so that the outdoor unit starts defrosting according to the first sub-instruction; wherein the first preset sub-condition includes a relationship between an accumulated heating time of the outdoor unit and a minimum value of an outdoor ambient temperature; the second preset sub-condition includes the outdoor ambient temperature that meets a target condition, a relationship among the minimum value of the heat exchange pipe temperature, the outdoor ambient temperature, and a humidity threshold of the relative humidity of the outdoor environment.
 8. The air conditioner system according to claim 5, wherein the outdoor unit includes: a sensor configured to collect the operating parameters of the plurality of outdoor units; a communication device configured to send the operating parameters of the plurality of outdoor units to the cloud platform and receive the first instruction and the second instruction sent by the cloud platform; and a controller configured to control the plurality of outdoor units to perform one of defrosting and ending defrosting according to the first instruction and the second instruction.
 9. The air conditioner system according to claim 1, wherein the outdoor unit includes a compressor, and the air conditioner system further comprises: a cloud management platform communicatively connected to the outdoor unit, the cloud management platform being configured to receive and send the operating parameters of the outdoor unit, receive a third instruction and send the third instruction to the outdoor unit, and control an operating mode of the air conditioner; wherein the cloud platform is communicatively connected to the cloud management platform, and the cloud platform is further configured to: perform a target calculation according to the operating parameters of the outdoor unit; send the third instruction to the cloud management platform, so as to send the third instruction to a corresponding outdoor unit through the cloud management platform, so that the outdoor unit adjusts a maximum value of a target frequency of the compressor according to the third instruction, and a maximum value of an actual frequency of the compressor is substantially equal to the maximum value of the target frequency.
 10. The air conditioner system according to claim 9, wherein the cloud management platform includes: an Internet of Things (IoT) management platform communicatively connected to the outdoor unit, the IoT management platform being configured to perform information interaction with the outdoor unit, receive the operating parameters of the outdoor unit, and send the operating parameters to the cloud platform; and a server communicatively connected to the cloud platform and the IoT management platform, the server being configured to perform human-computer interaction and update and maintain a database; the database being created by the cloud platform, and stored in the cloud platform.
 11. The air conditioner system according to claim 10, wherein the outdoor unit includes: a sensor configured to collect the operating parameters of the outdoor unit; a communication device configured to perform information interaction with the IoT management platform, send the operating parameters of the outdoor unit, and receive the third instruction from the cloud platform; and a controller configured to adjust the maximum value of the target frequency of the compressor according to the third instruction.
 12. The air conditioner system according to claim 10, wherein the IoT management platform includes: a communication interface configured to maintain an access state of the outdoor unit, receive the third instruction, and send the third instruction to the outdoor unit; and a service gateway configured to receive the operating parameters of the outdoor unit, send the operating parameters to the cloud platform, receive operating instructions sent by the server, and send the operating parameters to the server.
 13. The air conditioner system according to claim 10, wherein the cloud platform is further configured to: call the database and train data models of a heating control constant and a cooling control constant; correct the data models according to latest operating parameters of the outdoor unit collected; send a target configuration to the outdoor unit according to one of a set model and historical data; and receive operation instructions sent by the server and send the data models of the heating control constant and the cooling control constant to the server.
 14. The air conditioner system according to claim 9, wherein when the cloud platform performs the target calculation of the outdoor unit, the cloud platform is configured to: calculate one of a heating control constant and a cooling control constant according to the operating parameters and send one of the heating control constant and the cooling control constant to the outdoor unit through the cloud management platform.
 15. The air conditioner system according to claim 14, wherein the cloud platform is further configured to: obtain a maximum value of a saturation pressure according to a maximum value of a condensing temperature in a case where the outdoor unit is heating and use a control target value to correct the maximum value of the saturation pressure, so as to obtain the heating control constant; if a set parameter is equal to a first preset value, determine a minimum value of a target evaporation temperature of the outdoor unit as the cooling control constant; if the set parameter is equal to a second preset value, determine the cooling control constant according to a corresponding relationship between the set parameter and the cooling control constant.
 16. A control method of an air conditioner system, wherein the air conditioner system includes: at least one air conditioner including an indoor unit and an outdoor unit; and a cloud platform communicatively connected to the outdoor unit; the method comprises: collecting and sending operating parameters of the outdoor unit; if determining that the operating parameters satisfy a first preset condition, sending a first sub-instruction to the outdoor unit, so that the outdoor unit starts defrosting according to the first sub-instruction; and if determining that the operating parameters satisfy any one of a plurality of second preset conditions, sending a second sub-instruction to the outdoor unit, so that the outdoor unit ends defrosting according to the second sub-instruction; wherein the plurality of second preset conditions include: a first determining condition, the first determining condition including using at least one of a minimum value of a heat exchange pipe temperature, a relative humidity of an outdoor environment, time when the outdoor unit has performed defrosting, a maximum value of an exhaust pressure of the outdoor unit, or a maximum value of an exhaust temperature of the outdoor unit as a determining parameter; a second determining condition, the second determining condition including using at least one of the time when the outdoor unit has performed defrosting or the maximum value of the exhaust pressure of the outdoor unit as a determining parameter; and a third determining condition, the third determining condition including using the time when the outdoor unit has performed defrosting as a determining parameter.
 17. The method according to claim 16, wherein the at least one air conditioner includes a plurality of air conditioners, and the cloud platform is communicatively connected to a plurality of outdoor units in the plurality of air conditioners, and the method further comprises: in a case where at least one of the plurality of air conditioners is in the heating mode, the cloud platform determining a heat exchange mode of the plurality of outdoor units, determining an alternate defrosting decision according to the heat exchange mode and the operating parameters of the plurality of outdoor units, and sending the first instruction and a second instruction to a corresponding outdoor unit; the alternate defrosting decision including determining, by the cloud platform, that the plurality of outdoor units each perform one of defrosting and ending defrosting; the first instruction including the first sub-instruction and the second sub-instruction; the corresponding outdoor unit performing one of defrosting and ending defrosting according to the first instruction and the second instruction.
 18. A control method of an air conditioner system, wherein the air conditioner system includes: an air conditioner including an indoor unit and an outdoor unit, the outdoor unit including a compressor; a cloud management platform communicatively connected to the outdoor unit; and a cloud platform communicatively connected to the cloud management platform; the method comprises: collecting and sending operating parameters of the outdoor unit; the cloud management platform receiving the operating parameters of the outdoor unit and sending the operating parameters to the cloud platform; the cloud platform performing a target calculation according to the operating parameters, and sending a third instruction to the cloud management platform; the third instruction including a heating control constant and a cooling control constant calculated by the cloud platform according to the operating parameters; the cloud management platform sending the third instruction to a corresponding outdoor unit; the outdoor unit adjusting a maximum value of a target frequency of the compressor according to the third instruction, so that a maximum value of an actual frequency of the compressor is substantially equal to the maximum value of the target frequency; wherein that the cloud platform performing the target calculation according to the operating parameters and sending the third instruction to the cloud management platform, includes: obtaining a maximum value of a saturation pressure according to a maximum value of a condensing temperature in a case where the outdoor unit is heating and correcting the maximum value of the saturation pressure by using a control target value, so as to obtain the heating control constant; if a set parameter is equal to a first preset value, determining a minimum value of a target evaporation temperature of the outdoor unit as the cooling control constant; if the set parameter is equal to a second preset value, determining the cooling control constant according to a corresponding relationship between the set parameter and the cooling control constant.
 19. The method according to claim 18, wherein the cloud management platform includes an IoT management platform and a server, and that the cloud management platform receiving the operating parameters of the outdoor unit and sending the operating parameters to the cloud platform, including: the IoT management perform information interaction with the outdoor unit, receiving the operating parameters of the outdoor unit, and sending the operating parameters to the cloud platform; and the server performing human-computer interaction and updating and maintaining a database.
 20. The method according to claim 19, further comprising: calling, by the cloud platform, a database and training data models of the heating control constant and the cooling control constant; correcting, by the cloud platform, the data models according to latest operating parameters of the outdoor unit collected; sending, by the cloud platform, a target configuration to the outdoor unit according to one of a set model set and historical data; receiving, by the cloud platform, operation instructions sent by the server, and sending the data models to the server. 